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On Sat, 14 Feb 2009, tom wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > I'm doing a little bit of research into the power consumption ratings on > the power supplies for different makes and models of Ultra Mobile > Laptops (Acer Aspire One's, Asus Eee's etc). > > I have a Aspire One (Model ZG5) which according to the power supply is > rated 19V 1.58A = 30.02 Watts. It got me thinking that 30Watts still > seemed quite high, although my model does have a 120Gb mini HDD, so I > want to compare different models and configurations. Remember that you may need up to double the power when it needs to charge the battery. With my AAO... (8GB flash drive)... On my meter - charging, not turned on, it's currently taking 20W I turned it on and it peaked to 28W, then settled down to .. 27W. (Clock speed is now 800MHz, Wi-Fi is ON) However I don't know how much of those 27W is now going to the battery - I'll need to wait until it's charged.. My PSU, like yours is rated at 30W, so it's running pretty near flat-out. Running burnBX, the clock speed goes up to 1.6GHz, but it's still only consuming 27W. Even running up compiz and doing a lot of 3D screen rotations, it's stable at 27W. Other benchmarks didn't change it. I'll wait an hour until it's charged and let you know what it drops down to. >>From my own measurements on other Intel Atom systems, varying the clock-speed does virtually nothing to help the power consumption - the CPU itself is fanless. The Fan is on the graphics/northgridge chip unit )-: > PS if you own an Acer (like me) you will need either very good eye > sight, or a strong magnifying glass (in my case) to read the ratings. I > guess Im getting old now ;-) Just remember that the ratings don't say how much it actually uses. You need a meter for that. (Abd I could read it just fine... with my reading glasses on!) Gordon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html